Juniper JUNOSE 11.2.X MULTICAST ROUTING, Configuration Manual

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Use to place a remote device, connected at the T1 over T3 layer, in loopback.
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Specify one of the following options:
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line fdl ansi —Sends a repeating 16-bit ESF data link code word (00001110 11111111)
to the remote end requesting that it enter into a network line loopback. Specify the
ansi keyword to enable the remote line FDL ANSI bit loopback on the T1 line, according
to the ANSI T1.403 specification.
•
line fdl bellcore —Sends a repeating 16-bit ESF data link code word (00010010
11111111) to the remote end requesting that it enter into a network line loopback. Specify
the bellcore keyword to enable the remote line FDL Bellcore bit loopback on the T1
line, according to the Bellcore TR-TSY-000312 specification.
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payload [ fdl ] [ ansi ]—Sends a repeating 16-bit ESF data link code word (00010100
11111111) to the remote end requesting that it enter into a network payload loopback.
Enables the remote payload FDL ANSI bit loopback on the T1 line. You can specify
fdl or ansi .
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Example
host1(config-controll)# path 12 ds3 2 t1 14 loopback remote payload
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Use the no version to send the 16-bit ESF data link code word to deactivate the loopback
at the remote end, depending on the last activate request sent to the remote end.
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See path ds3 t1 loopback.
path ds3 t1 remote-loopback
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Use to enable the router to accept remote loopback requests from a remote device
connected at the T1 over T3 layer.
•
Example
host1(config-controll)# path 12 ds3 2 t1 14 remote-loopback
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Use the no version to restore the default, which is to reject remote loopback requests.
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See path ds3 t1 remote-loopback.
Testing Connectivity
Use the path overhead j1 command to check for connectivity between the router and a
SONET/SDH device at the other end of the line. This command defines:
•
A message that the router sends from the specified interface to the SONET/SDH device
at the other end of the line.
• A message that the router expects to receive on the specified interface from the
SONET/SDH device at the other end of the line.
When you define a message that the interface sends, you must monitor receipt of that
message at the remote end.
Copyright © 2010, Juniper Networks, Inc. 146
JunosE 11.2.x Physical Layer Configuration Guide